1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2023-2024 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <djwong@kernel.org> 5 */ 6 #ifndef __XFS_BUF_MEM_H__ 7 #define __XFS_BUF_MEM_H__ 8 9 #define XMBUF_BLOCKSIZE (PAGE_SIZE) 10 #define XMBUF_BLOCKSHIFT (PAGE_SHIFT) 11 12 #ifdef CONFIG_XFS_MEMORY_BUFS xfs_buftarg_is_mem(const struct xfs_buftarg * btp)13static inline bool xfs_buftarg_is_mem(const struct xfs_buftarg *btp) 14 { 15 return btp->bt_bdev == NULL; 16 } 17 18 int xmbuf_alloc(struct xfs_mount *mp, const char *descr, 19 struct xfs_buftarg **btpp); 20 void xmbuf_free(struct xfs_buftarg *btp); 21 22 int xmbuf_map_page(struct xfs_buf *bp); 23 void xmbuf_unmap_page(struct xfs_buf *bp); 24 bool xmbuf_verify_daddr(struct xfs_buftarg *btp, xfs_daddr_t daddr); 25 void xmbuf_trans_bdetach(struct xfs_trans *tp, struct xfs_buf *bp); 26 int xmbuf_finalize(struct xfs_buf *bp); 27 #else 28 # define xfs_buftarg_is_mem(...) (false) 29 # define xmbuf_map_page(...) (-ENOMEM) 30 # define xmbuf_unmap_page(...) ((void)0) 31 # define xmbuf_verify_daddr(...) (false) 32 #endif /* CONFIG_XFS_MEMORY_BUFS */ 33 34 #endif /* __XFS_BUF_MEM_H__ */ 35